1424240 has 40 divisors (see below), whose sum is σ = 3489360. Its totient is φ = 539136.

The previous prime is 1424237. The next prime is 1424257. The reversal of 1424240 is 424241.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1052 + ... + 1988.

It is an arithmetic number, because the mean of its divisors is an integer number (87234).

2^1424240 is an apocalyptic number.

1424240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1424240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1744680).

1424240 is an abundant number, since it is smaller than the sum of its proper divisors (2065120).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1424240 is a wasteful number, since it uses less digits than its factorization.

1424240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 969 (or 963 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 1424240 is about 1193.4152672058. The cubic root of 1424240 is about 112.5108466908.

Adding to 1424240 its reverse (424241), we get a palindrome (1848481).

Subtracting from 1424240 its reverse (424241), we obtain a palindrome (999999).

The spelling of 1424240 in words is "one million, four hundred twenty-four thousand, two hundred forty".